Chapter 7 (Running Gear)
Spring Loaded Hydraulic Shock
Absorber
The suspension spring and the hydraulic shock absorber (Fig. 24)
perform different functions. The supporting spring (Fig. 24, #4)
serves as an elastic element of the suspension, while its
oscillations are damped by the double-acting hydraulic absorber
enclosed in body (Fig. 24, #7) inside the suspension spring (Fig.
24, #4).
The suspension features cam-type adjusters (Items 11 and 12)
used for varying the pretension of the supporting springs to suit
the load and the road condition. The degree of tension of the
springs is adjustable allowing two positions. The first (lower)
position corresponds to the load due to the motorcycle's own
mass, the driver's and one passenger's (sitting in the sidecar)
mass; the second (upper) position of moving cam (Fig. 24, #11)
corresponds to the maximum load.
When the motorcycle is used under the maximum load, adjusting
the spring in the sidecar
wheel shock absorber simultaneously with adjusting the
compression of the spring in the motorcycle shock absorbers.
Care of shock absorbers. Fill the shock absorber with 105 cm³ of
hydraulic fluid composed of industrial oil or spindle oil. Change
hydraulic fluid every 10,000 km. Each time during maintenance,
check the bolts fixing the top and bottom ends of the shock
absorbers for tightness.
Figure 24. Spring-Loaded Hydraulic Shock Absorber
1 - Upper tip 12 - Fixed cam
23 - Compression valve
stem
2 - Retainer 13 - Lower end piece .
24 - Compression valve
assy
3 - Housing 14 - Compression valve body 25 - Piston
4 - Spring 15 - Rebound valve nut 26 - Rod guide
5 - Buffer 16 - Rebound valve spring 27 - Seal spring
6 - Barrel nut 17 - Rebound valve retainer 28 - Container nut seal
7 - Shock absorber body 18 - Rebound valve plate 29 - Seal holder
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